Write a firefox plug-in to use firefox instead of curl for client-server communication

Although curl can pretend to be normal browser by manipulating the agent in the GET request, we are still no following a browser pattern in fetching a page and all its related content.

Hence, using Firefox directly to fetch payloads would increase the indistinguishibility of ST.

However, this is a major tasks as it will changes the meaning of capacity of a payload, etc.